Videos Fitness Friday: Bootcamp at Michigan Hy-Fit Athletics Check out the video above to see the action. Fitness Friday: Training at Michigan Hy-Fit Athletics in Auburn Hills Check out the video above to see the action. Fitness Friday: Training like a Spartan from ‘300′ Check out the video above to see the action. Fitness Friday: Hy-Fit workout at Michigan Hy-Fit Athletics Check out the video above to see the action. Fitness Friday: Building muscle to burn more fat Check out the video above to see the action.